Fire Proof Cob Web Glue –
Not all hot glue is the same, but most all Hot melt glue used for cob webbing will pass a fire marshalls vertical flame test, (purchased from a haunt vendor or a craft store- it doesn't matter).
The melting webs will simply extinguish the flame when applied. Check the MSDS sheet on the glue and it should read that glue won't ignite until it reaches in excess of 1000 degrees. Thats safem (and proof enough), for inspectors from CA to NY, as far as our clients have been telling us for over 10 years.
Michael J. Chaille
Ghost Ride Productions, INC.